Merge branch 'main' of https://github.com/actions/virtual-environments into v-malob/xcode

images/macos/helpers/Common.Helpers.psm1

@@ -95,4 +95,49 @@ function Invoke-ExpressionWithValidation {
         throw "Command '$Command' has finished with exit code $LASTEXITCODE"
     }
     return $output
+}
+
+function Start-DownloadWithRetry
+{
+    Param
+    (
+        [Parameter(Mandatory)]
+        [string] $Url,
+        [string] $Name,
+        [string] $DownloadPath = "${env:Temp}",
+        [int] $Retries = 20
+    )
+
+    if ([String]::IsNullOrEmpty($Name)) {
+        $Name = [IO.Path]::GetFileName($Url)
+    }
+
+    $filePath = Join-Path -Path $DownloadPath -ChildPath $Name
+
+    #Default retry logic for the package.
+    while ($Retries -gt 0)
+    {
+        try
+        {
+            Write-Host "Downloading package from: $Url to path $filePath ."
+            (New-Object System.Net.WebClient).DownloadFile($Url, $filePath)
+            break
+        }
+        catch
+        {
+            Write-Host "There is an error during package downloading:`n $_"
+            $Retries--
+
+            if ($Retries -eq 0)
+            {
+                Write-Host "File can't be downloaded. Please try later or check that file exists by url: $Url"
+                exit 1
+            }
+
+            Write-Host "Waiting 30 seconds before retrying. Retries left: $Retries"
+            Start-Sleep -Seconds 30
+        }
+    }
+
+    return $filePath
 }